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【单选题】
Once the two fragments are joined, the final sealing phosphodiester bond is formed byA.
Polymerase
B.
exonuclease
C.
Transcriptase
D.
Ligase
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【简答题】废物利用(环保手工创意)
【单选题】Smoking is bad for your health. You'd better _______. [ ]
A.
set it up
B.
give it up
C.
pick it up
D.
look it up
【单选题】The Emergency Position Indicating Radio Beacon on a cargo vessel must be stowed ______
A.
in an inside passageway
B.
in an approved bracket
C.
so that it is accessible from the bridge of the vessel
D.
so that it will float free if the vessel sinks
【单选题】Cut the apples and then put them the blender. [ ]
A.
in; up
B.
on; up
C.
up; in
D.
up; on
【单选题】They are too tired _____. [ ]
A.
not to stand up
B.
to stand up
C.
to they stand up
D.
stands up
【单选题】Cut up the pear and then _____ . [ ]
A.
mix up it
B.
mix up them
C.
mix it up
D.
mix them up
【单选题】All the ingredients are in the bowl. Please mix _____. [ ]
A.
it up
B.
up it
C.
up them
D.
them up
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